Transmission mechanism



UNITED STATES PATENT onirica i l THEODORE DOUGLAS, OF SOARBORO, NEW YORK, `Assciivoit TO DUPLEX niieiivn GOVERNOR COMPANY, INC., OF iaiaooiizLYn,4 NEW YORK, A CORPORATION ois' NEW YORK.

' y TRANSMISSION MEOHANI'SM.

Specification of Letters Patent. Patented M ri 23, 192@ ltljiplicaticii filed .T une 26,` 1818. Serial 110.242,113.

To all whom 'it may concern:

Be it known that I, Tiinonoun DOUGLAS, a citizen of the United States, residing, in Scarboro, in the county of Westchester and State of New York, have invented certain new and 'useful Improvements in 'lransniission lvlfechanism, oi' which the following a specification. y

ly invention relates to an improved transmission mechanism; particularly a triuisi'nission mechanism for use upon motor vehicles. i

The principal object of myinvention is to provide a transmission mechanism which is simple in construction and composed oi relatively lew parts; and which is designed to be quickly mounted in operative position by :being f pplied to the casing' that incloscs the elsing#l speed gearing of the vehicle; and be zi-ctuated by one of the members by said gearing Without interfering with the proper function of the latter. l

Jlo'iother object of my invention is to devise a transmission mechanism by which motion. can be imparted to a plurality of the accessories oi the vehicle or the engine driving' it; :tor eample the governor that regulates the engine, and the speedometer that indicates the rate of travel of the vehielo. i

.ln the 'following description and by rel erence to the drawings l sct forth a pre- :terr-ed torni or embodiment of my invention; but l of course may make alterations in what is actually shown herein, consistent with the scope ot' the appended claims Figure l is a top plan oit la housing` in which the operating elements of my im# proved transmission mechanism are dis# posed` the same being,` mounted on .the casing' of the change-speed gearing of' a motor vehicle.

Fig. 2 is a longitudinal section, taken on the line 2 2, in Fig. 1, and

Figg3is a transverse section taken on the line $43 of Fig. 1.

The same numerals identify the same parts throughout l .ln the particular description ofthe draiv ings, l employ the numeral 1 to indicatepart o'l` a easing in which the usual change speed -gearing' of an automobile or motor truck is located; and to this casing Iaalix a housing; 2 Which forms part of my transmission mechanism and ineloses the operatingele ments of the saine. This housing 2 can be i made as a single casting and it includes an extension 3 which carries bearings for a position. The space between these tivo bear ings is about the same as the thickness of l l thc gear 7 and `:1s-this gear T is fixed to the shaft 6 in any suitable Way, axial movement or end play of this shaft is prevented.

The housing,- 2 has an aperture .in the bottoni, through ivhich the gear 7 can project to the outside oli' the same; and when this housingI is secured to thc casing` 1 the aperture mentioned will register With a similar aper ture in the casing; whereby the gear 7 may project into the casing l, and there mesh with a gear 8, which acts as a driving` 1nem ber. This gear 8, being located inside the casing 1, forms part ci.' the change speed gearing above mentioned. I do not Wish to `be limited to any particular one of the gears in the casingl; but the gear 7 should. preferi ably mesh with a gear that driven at some speed that is fixed 'with reference to the rate of the travel of the vehicle; for example, the gear 8 will be one of the gears for shitting from-one ratio to another, mounted on the propellershaiit @attendingfrom the casing 1 tothe rear or drive Wheels of the vehicle, which of course, need not be shown. Hence, as illustrated by the broken lines in Fig. 2, the gear 8 is made capable Of axial movement or adjustment for the purpose ol" assuming y different predetermined positions in the casingby slidingthis gear in one direction or the other on its supporting shaft in the easingl. gi i The shaft (i projects through the bearing" A inside the housing' l into the extension 3 below the shaft 4. On its end adjacent this shaft 4 it carries spiral teeth 9 which mesh with a Spiral gear 10 keyed to the shalt l. As Ishown in Fig. 3, the shaft 4l is mounted 'in alined bearings ll; and the sides of the extension are open but can be furnished vvith closing` means inthe shape of suitableV glands -12 having centralbore into which the bean iio ing members l1 are received. The means '12 thus .servealso to support-the bearings l1. vThese glands may project into the eX- f tension far enough to confine the gear l0 against the axial movement or side play; and the bearings 11 may be in the shape of bushings having their outer ends threaded to receive nuts or the like'if desired. The opposite ends of the shaft -t are adapted for connection with the devices to be driven by this shaft, such as the speedometer of the vehicle and the governor of the engine for propelling the vehicle. For the purpose 'mentioned these ends may be provided with recesses, which may bev round, with a key Way, or polygonal in cross-section; so that the ends of the shaftsiof the governor and the speedometer can be thrust into them, From the above description it will be apparent that' my transmission mechanism is very simple in its construction and satisfactory in its utilization. Once the housing 2 is mounted on the casing l, with the gear 7 in meshwith the gear 8, the elemert 4. Will be turned, no matter what position `the gear 8 may assume, 'because the gears 7 and 8 will maintain their operative connection or relation for allrelative positions of these gears; even when the gear 8 is moved as far to the left as it Will go, it will still drive the gear 7 through the engagement of the ends of its teeth with the ends of the teeth of the gear 7; and it will operate the gear 7 in the same way when vmoved. over to the right. As little power is required to rotate the gear 7, the

engagement of the teeth ot the gears 7 and 8 over the entire length of the same is not essential.

The bearing 5 carrie'dby the wall of the housing 2 as shown in Fig. 2, may be open; but the adjacent end ot the shaft (3 will preferably be within this bearing. Both the bearings 5 will be lined with suitable jackets or bushings to take up wear;- and the bearing 5 in the outer wall of the housing 2 will carry a suitable packing disk 18 which fits against the end of Ithe shaft 6 andthe bushing or -jacket therein. i Over this packing disk 13 may ibe placed a plate or disk llt to close up this bearing. ln order to secure the housing 2 to the gear case l the housing may have a iiange l5 at the bottom to enable it to he bolted in place on the gear casing.

The driving member S and the transmission mechanism thus preserve their operative relation or connection for all positions of the gears 8, and the necessary functions of the change speed gear in the ease lare subjected to no hindrance, interference, or

modification whatever. Through the means `for imparting motion from the shaft, to the shaft 4a such as the spiral teeth and gear 10, the gear 7` works most efficiently,

and though I have stated that the devices to be operated ,by my transmission mechanism are the governor or speedometer, l oi `course wish to be understood that other devices may be connected to the shaft 4 instead, it circumstances should so require.

Having described my invention what l believe to be new and desire to secure and protect by Letters Patent oi the United States is:

1. A driving member capable of assuming predetermined positions and transmission mechanism lto be actuated thereby, said mechanism' and said member preserving operative lrelation in all positions ot' said member, said mechanism including an element for imparting motion to a plurality of devices to be operatedthrough said mechamsm.

2.- A driving member capable of assuming predetermined positions, a casing therefor;

4and transmission mechanism mounted on said casing, said member and said mechanism preserving operative relation in all positions of said member, said mechanism including an element for imparting motion to a plurality of devices to be operated through said mechanism.

3. A rotatable gear capable of axial movement to predetermined positions and a gear to be actuated thereby, said gears maintaining operative connection in all relative positions of the same, the axial movement of the rotatable gear being substantially parallel to the axis of the other-of said gears.

4. A rotatable gear capable of axial adjustment to predetermined positions, a gear to be actuated7 thereby, said gears maintaining operativ relation in all relative positions of the same, and an element to be driven b v the sccondnamed gear, said clement impaitingii'potion to a plurality oi" devices to be operated through said element.

A casing, a rotatable gear capable of axial adjustment to predetermined positions therein and a gear to be actuated by said rotatable gear, saidgears maintaining operative relation i-n allrelative positions of said. gears, the axial movement of the rotatablel gear being substantially parallel to the axis of the other of said gears.

6. vA casing, a. rotatable gear capable of axial adjustment to predetermined j'iositions therein, a gear to be actuated by said rotatable gear, said gears maintaining ope ati ve relation in all relative positions of said gears, and an element connected to the sccond'named gear and adapted to impart motion to a plurality of devices to be operated through said elementl 7. A casing, a gear ea able of axial adjustment to predetermine positions therein, a housing secured to the casing, a broadiaced gear in the housing to mesh with the rotatable gear in all positions of the latter,

i ,ee/ieee e ehefg'eeii'ied by the housing projecting iheiefi'om, ,ea-ici ehaiflb having," both ends adopted. for coimeeiioii with devices to be operated, ondiiieune for importing motion to Seid .housing comprising seid Shaft from seid broed-faoed geel'.

i, A iioueiiig im' ueiisiiiiselon mechanism, o pew of bearings,

und having mi extension in line with said beeigiiigg'e, eind menos zieeooieted with seid.

extension i'oi' euppoi'iing e poil of bearings transversely of the ii'eonamed bearings.

9. .2i i1c iisi1iigd foi' transmission mechanism iiieiudiiig ai plir of bem-ings, one of seid, bearing-e beingiocuted inside of Seid housing, seid housing having en extension in lino with :seid bearings, zuid iiiee,ns`(zii"i'ied by the extension for supporting zi peil' of Domingo transversely of the iet-uul'iied bearings.

l0. Aeesiiig, :i rotatable geel capable of axial adjustment to predetermined positioiie in seid casing', e housing seemed to the oosing, said housing having ad pair of bearings,

one of which is inside bhe housing, shaft iii said heel-ings eziri'ying; zilejeei inside of Seid. housing, said housing and said. wellig hav ing registering apertures; thiough, which seid gear muy pi'ogeot ifo be engaged log/,the

the exitooeioii.

In, testimony. whereof, lieve Signed my neme to this speelieotlou 'time ifi-1th dey of THEDRE DIOGLM. 

